# What virgoOS is, and what runs on it

> A short tour of virgoOS, the open-source operating system that turns a small server into a private cloud.

Published 2026-10-01 · https://univrs.cloud/blog/what-virgoos-is/

virgoOS is an operating system for one job: running your files, email and collaboration tools on a server you own, without someone having to administer that server by hand. All of it is open source.

A machine running virgoOS is called a node. This post walks through what a node does from the first time it starts.

## Setup, once

The first time a node starts, it runs setup in a browser. Setup sets the network, creates the storage pool, registers the node with your fleet account, installs the core apps and replaces the factory password. When it finishes, you manage the node by signing in at its name, for example `https://spica.virgo.univrs.cloud`.

A node needs at least two data drives of the same size and at least 8 GB of RAM. The [setup guide](https://docs.univrs.cloud/setup/) covers each step.

## Storage that keeps a history

Everything lives on a redundant ZFS pool. Depending on how many drives the node has, setup offers layouts from a mirror to RAID-Z3, which survive between one and three drive failures.

The pool also keeps its own history. The node takes a snapshot for each of the last 36 hours, 30 days, 60 months and 5 years, and removes older ones by itself. A snapshot is a read-only copy of the data as it was at one moment, and it only takes up space for what has changed since.

_Nextcloud's snapshots on a timeline, with 76 restore points kept by the hourly, daily, monthly and yearly schedules._

That history is what makes a deleted or encrypted file recoverable. The indexer catalogues the files in the snapshots every hour, so you can search for earlier and deleted versions of a file from an app's snapshots, or from a terminal:

```sh
virgo indexer --help
```

Once a month the pool reads all of its data back, checks it against its checksums and repairs anything that does not match.

## Apps from the App center

Three core apps are installed during setup: Traefik, which routes requests to the apps and handles their SSL certificates, Authelia, which holds the node's accounts, and a terminal in the browser.

Everything else comes from the App center:

- **Nextcloud** for files, with Euro Office for editing documents together, a high-performance backend for calls and a shared whiteboard.
- **A mail server** on your own domain, with spam and virus filtering.
- **WireGuard** for an encrypted connection from outside your network.
- **Pi-hole** to block ads and trackers for the whole network.
- **Gitea**, **Plausible**, **qBittorrent** and **Dockhand** for those who need them.

_The App center, listing the apps that can be installed, each with a description and an Install button._

Each app keeps its data on the pool and is reached at its own name under the node's domain.

## Managed from anywhere

Registering a node connects it to your fleet account at [fleet.univrs.cloud](https://fleet.univrs.cloud). The node connects out to the fleet itself, so you can manage it from anywhere, even when it sits behind CGNAT with no public IP address and no forwarded ports.

That covers managing the node. Reaching what runs on it is different: email, sharing files from Nextcloud with other people, the VPN and opening the apps from outside your local network all need an internet connection with a public IP address and [a few ports forwarded](https://docs.univrs.cloud/setup/ports/) on your router. Without them, the apps work only inside your local network.

## Where to go next

- The installer images are on the [releases page](https://github.com/univrs-cloud/virgo/releases/latest).
- The [documentation](https://docs.univrs.cloud/) covers setup, every management page and the `virgo` command.
- The source is at [github.com/univrs-cloud](https://github.com/univrs-cloud), under the GNU General Public License, version 2.